System Start Up; Fill Condensate Trap With Water - Dunkirk DCBF-100 Manual

9.3 System Start Up

Follow all codes and regulations when filling the boiler.
Use drain taps to allow system to completely drain.
Thoroughly flush the heating system before boiler is
connected and again after first heating season.
• Boiler is fitted with automatic air vent positioned on
pump Vent and is fitted with adjustable sealing cap.
See Figure 9-1.
• Open central heating flow and return valves. Spindle
is flat in-line with valve.
• Open fill point valve on filling system until water
begins to flow. To aid venting boiler drain may be
open until water flows out. Close drain as soon as
water appears.
• During initial system air purge open valve connected
to top left of heat exchanger. Open four (4) full
turns counterclockwise until steady stream of water
is witnessed. Close fully turning clockwise with no
tools needed. See Figure 9-1.
• Systems using radiators to remove air - Vent each
radiator in turn, starting with lowest in the system.
• It is IMPORTANT the pump is properly vented
to avoid running it dry and damaging its bearings.
Unscrew and remove cap from center of pump. Use
screwdriver. Rotate exposed spindle about half turn,
replace cap.
• Check operation of heating pressure relief valve. Pull
lever on top of valve upwards lifting the seat. This
will allow water to escape from system. Check water
is escaping from the system.
• Open cold water supply inlet valve. Turn on all
domestic hot water taps. Allow water to flow until no
air is present. Turn off domestic hot water taps. See
page 4 - Physical Data and section 2.7 Operational
Features.

9.4 Fill Condensate Trap with Water

WARNING
!
Asphyxiation hazard! Fill condensate trap
before starting boiler to avoid combustion
products escaping boiler. Failure to follow these
instructions could result in death or serious
injury.
• To fill the condensate trap pour water into exhaust
vent until water begins to flow through the siphon.
• Visually inspect the siphon to ensure it is full with
clean water.
• During operation check condensate trap to ensure it
drains properly.
Condensate trap must be manually filled with
Note
water at initial start up.
9 - START UP PROCEDURE
FIGURE 9-1 Condensate Drain Assembly
150 Model shown (location similar in all sizes)
Condensate Drain
Connection
47
Air
approximately
Purge
1 cup of water
Valve
into flue way
240013375 REV A, [07/01/2021]
Pour
of boiler.
Condensate
Tray
Air Vent